The Gunners squandered a three­-goal lead against the Belgians at the Emirates last week as they folded in dramatic fashion.

But at a meeting with manager Arsene Wenger last week, the players owned up to lacking the focus they needed to maintain their lead.

To a man, they accepted there was no excuse for the collapse and that it was a collective failing, rather than the fault of any individuals.

Wenger said: ”OK, we have four points from Anderlecht and we need one more to go through. Let us go forward and try to win at Swansea.”

And keeper Szczesny said there was no prospect of a hangover at the Liberty Stadium.

“No, not really,” said the Poland international, who will meet up with his compatriot and former Arsenal understudy Lukasz Fabianski (below) ahead of the match and travel with him on international duty afterwards.

“It was a one­-off and we know it was a one­-off,” added Szczesny. "It doesn’t happen twice in a season.

“Arsene Wenger told us we can’t get complacent in such situations, especially in the Champions League. It was the best example and the best lesson we could really get.”

“It doesn’t affect you, you don’t want to prepare for the next game, thinking about what happened in the previous game. You just want to go out and get three points. I never have any feelings of revenge. I just try to focus on the game.

“What happened on Tuesday was not good and we recognise that, but there’s no point thinking about that, going into Sunday. We just want to get the three points.”

And he does not want the post- match conversation with Fabianski to be one he would rather avoid.

“All I care about is what he’ll be telling me after the game,” said Szczesny. “We are going away with Poland and I just want to make sure he isn’t giving me any stick ! I have never played against him and he is a very good friend of mine.”

And if there is any stick? “I hope I’ll be on the right end of it!” he added.

There was no sign of panic from his manager Wenger when he previewed the match.

“The solution is – defend well and attack well,” said Wenger. “Every time you have the ball, you do not refuse to play and when you haven’t got the ball, you defend well.

“I rectified their mistakes. I don’t say, ‘You’re an absolute idiot’. I ask them, ‘What should you have done there?”